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271 results about "Data transmission" patented technology

Data transmission (also data communication or digital communications) is the transfer of data (a digital bitstream or a digitized analog signal) over a point-to-point or point-to-multipoint communication channel. Examples of such channels are copper wires, optical fibers, wireless communication channels, storage media and computer buses. The data are represented as an electromagnetic signal, such as an electrical voltage, radiowave, microwave, or infrared signal.

Lamp socket type camera

The present invention is to provide a lamp socket type camera which includes an outer housing, a bulb socket connected to the outer housing and capable of being threadedly and electrically connected to an existing lamp socket for receiving electric power from the lamp socket, a power module received in the receiving space and electrically connected to the bulb socket for converting the electric power received from the bulb socket into a required specification, a control module received in the receiving space and connected to the power module, a wireless transmission module received in the receiving space and connected to the control module, and an image capturing element connected to the power module and the control module respectively for capturing image data from outside of the outer housing and transmitting the image data to the control module which will send the image data out via the wireless transmission module wirelessly.
Owner:LIU DA MING

Underwater trenching system

InactiveUS6022173AImprove reliabilityProcess economyPipe laying and repairMechanical machines/dredgersData transmissionSelf guided
A self-guided system for trenching water bottoms for the installation of a pipeline. The preferred embodiment of the present invention teaches a system which is configured to be mounted about the pipeline to be buried, and which further contemplates a uniquely configured, forward mounted trenching/drive mechanism incorporating a cutter wheel generally about the width of the desired trench, the mechanism configured to propel the system as well as trench the desired area. An alternative embodiment of the contemplates a frontal high pressure jet array in lieu of the cutter head. The trenching/drive mechanism of the preferred embodiment of the present invention further includes a high pressure spray array mounted about the frontal cutter wheel area, and a suction/mud pump assembly to the rear of the cutter wheel. The high pressure spray array provides the dual purpose function of loosening the area to be trenched, as well as cleaning and removing the trenched matter from the cutter wheel. The present invention further includes first and second buoyancy chambers which are configured to be uniformly lowered to the lower periphery of the unit frame, to provide skids for utilization of the present system in shallow water. An alternative embodiment of the present invention teaches the incorporation of a framed system similar to that as taught in the present invention, but without the trenching/drive mechanism, and with the addition of a pipe cutter mounted to the rear of the unit frame, for utilization of pipeline recovery and dismemberment operations. Other features of the present invention which are taught, and which may be implemented, include G.P.S. (global positioning system) receiver/data transmission for precise monitoring of the system during operations, thruster propulsion, and bottom loading of pipe into the frame via hinged bottom rollers, which may be powered.
Owner:SAXON SAINT E

Double-layer multi-carrier ultra-wideband wireless communication method

ActiveUS20120269234A1Reduce frequencyLow costTransmission path divisionEqualisersUltra-widebandFrequency spectrum
The present invention is a double-layer multi-carrier ultra-wideband wireless communication method, wherein the frequency band for ultra-wideband communication is divided into a plurality of sub-bands, then one or more sub-bands are used for data transmission, and the Orthogonal Frequency Division Multiplex (OFDM) multi-carrier transmission technology is used in each sub-band. In the transmitting party, the data symbols to be transmitted are allocated on M branches corresponding to the M sub-bands, and the OFDM modulation is implemented on the data symbols on each branch to obtain M branches of parallel data, then digital baseband multi-carrier modulation is implemented on the M branches of parallel data. Thereby, the spectrum of data on each branch is moved onto the digital sub-band corresponding to the radio sub-band one to one, so the digital baseband signal of the radio signal to be transmitted is obtained. Then, the digital signal is converted to an analog signal with a D / A conversion and an up-conversion, and the signal spectrum is moved to the radio frequency band in use, then the analog signal is amplified, filtered and transmitted via an antenna, thus the task of modulating M branches of parallel data onto M sub-bands is completed.
Owner:SOUTHEAST UNIV

IPv6/IPv4 translator

An object of the present invention is to realize packet communication between an IPv6 terminal connected to an IPv6 network and an IPv4 terminal connected to an IPv4 network. Another object of the present invention is to realize RTP communication for establishing sessions in accordance with SIP between an IPv6 terminal connected to an IPv6 network and an IPv4 terminal connected to an IPv4 network. For these objects, the present invention provides an IPv6/IPv4 translator for translating packets between IPv6 and IPv4 with means of translating addresses described in SIP messages into IPv6 addresses or IPv4 addresses. Moreover, the present invention provides the aforementioned IPv6/IPv4 translator with means of translating addresses described in SDP messages into IPv6 addresses or IPv4 addresses. These SDP messages shall be related to media data transmissions. Furthermore, the IPv6/IPv4 translator can be directly connected to a terminal connected to an IPv6 network and to a terminal connected to an IPv4 network, or can be connected via SIP proxy to an SIP terminal connected to an IPv6 network and to an SIP terminal connected to an IPv4 network. According to the present invention, the IPv6/IPv4 translator translates addresses described in SIP messages into IPv6 addresses or IPv4 addresses when translating packets from IPv6 to IPv4 or from IPv4 to IPv6. Therefore, it will be possible to perform communication from a terminal supporting IPv6 only to a terminal supporting IPv4 only. Also, it will be possible to perform communication from a terminal supporting IPv4 only to a terminal supporting IPv6 only. In addition, the IPv6/IPv4 translator translates addresses described in SDP messages into IPv6 addresses or IPv4 addresses when translating packets from IPv6 to IPv4 or from IPv4 to IPv6. Therefore, it will be possible to perform RTP communication for establishing sessions in accordance with SIP from IPv6 to IPv4 or conversely from IPv4 to IPv6, which is suitable for media data transmissions such as IP phone services.
Owner:YOKOGAWA ELECTRIC CORP

Method and apparatus for antenna mapping selection in MIMO-OFDM wireless networks

InactiveCN102185641ASpatial transmit diversityMultiplex communicationData transmissionMultiple antenna
A method and apparatus for selecting an antenna mapping in multiple-in / multiple-out (MIMO) enabled wireless communication networks. A candidate set of currently available antenna mappings is determined based upon measured long term channel conditions. An antenna mapping is selected from the candidate set, and the mapping is calibrated with a selected antenna mapping of a receiving wireless transmit / receive unit (WTRU). When the selected mappings are calibrated, packet data transmission begins. In an alternative embodiment, a calibration training frame (CTF) is used to calibrate multiple antenna mappings simultaneously or sequentially. Also disclosed are physical layer and medium access control layer frame formats for implementing antenna mapping selection according to the invention.
Owner:INTERDIGITAL TECH CORP

Method and system for remote wireless video surveillance

InactiveUS7051356B2Easily concealableColor television detailsClosed circuit television systemsTransceiverNetworking protocol
Disclosed are a system and method for providing wireless video surveillance of a remote location using microwave transmission of video data using TCP / IP networking protocol. The system comprises a remote unit having one or more analog cameras, a video encoder / decoder linked to a microwave transceiver using Ethernet transceivers connected by a twisted wire pair. The microwave transmission is received by a base unit comprising another microwave transceiver and Ethernet transceiver linked to a computer. The base unit computer is connected to one or more computer networks to enable transmission of the video data to multiple computer terminals on the network.
Owner:WEINSTEIN BRADLEY A

Detonation velocity photoelectric test method and apparatus of detonating cord

InactiveCN101435829AAmmunition testingDevices using time traversedTime-sharingData transmission
The invention relates to a photoelectric testing method for the detonating speed of a detonating fuse and a device thereof. The device is characterized in that the device at least comprises two multimode fibre probes inserted into the detonating fuse in certain distance, a fibre coupling connector, a PIN integrated photoelectric detector, a power supply, an FPGA high-speed data acquisition module and a liquid crystal display screen; the PIN integrated photoelectric detector is used to carry out time sharing processing on the temporal fore-and-aft relation of optical signals acquired by the probes in time; optical signals of a plurality of probes are converted into pulse electric signals and are transported to the FPGA high-speed data acquisition module; the input pulse electric signals are subjected to sampling, calculation processing, control and caching; the distance of each two probes of the plurality of the probes and the measured time are subjected to calculation processing to seek an average speed; the detonating speed and relevant data of the detonating fuse are transmitted to the liquid crystal display screen and are displayed; and the photoelectric testing method has the advantages of high testing precision, strong antijamming capacity, small volume, simple operation and the like.
Owner:ZHONGBEI UNIV

Coding method, coding transmitting device and system for data transmission

ActiveCN106937134AGood packet loss recovery effectGuaranteed packet loss recovery probabilityForward error control useSelective content distributionVideo transmissionVideo quality
The invention discloses a coding method for data transmission, mainly comprising the following steps: step a, setting an initial value p<t> of the predicted packet loss rate and the FEC redundancy r; step b, coding the data at the channel sending end to obtain a plurality of information packets; step c, calculating the packet loss recovery probability according to the predicted packet loss rate and the FEC redundancy r, and selecting an optimal RS coding model RS(Nf, kf); step d, carrying out error correction coding according to the optimal RS coding mode RS(Nf, kf) to obtain Nf-kf redundant packets; and step e, packaging and sending the coded redundant packets and the information packets together, and enabling the receiving end to update the predicted packet loss rate according to the packet loss conditions of the received information packets. According to the scheme disclosed by the invention, the channel sending end sends the efficiently-coded FEC redundant packets while sending the information packets so as to ensure that the channel receiving end can recover the packet loss in a video transmission process, and thus the video quality of the receiving end can be ensured.
Owner:SHENZHEN GRANDSTREAM NETWORKS TECH +1

UWB radar signal simulator based on FPGA and UWB radar signal generation method

InactiveCN101576619ASimplify writingGuaranteed flexibilityWave based measurement systemsRadar waveformsPci interface
The invention relates to a UWB radar signal simulator based on FPGA, comprising a PC104 interface module, an RAM module, an FPGA module and a high-speed DAC module; the PC104 interface module completes data transmission with a host with PC104 mode by a PCI protocol; the RAM module adopts six ZBT-SRAMs with the bit width of 32 as data cache; the FPGA module adopts Virtex-4 series of product XC4VLX40 offered by Xilinx company and comprises a PCI interface control module, a RAM control module, a high-speed DAC control module and a radar waveform control module; the high-speed DAC control module selects AD9736 of ADI company; the interconnection of all the modules is realized by control modules in the FPGA module, the PC104 interface control module completes butting joint of the FPGA module and the PC104 interface module; data generated by controlling a host computer is transmitted to the inner part of the FPGA module from the PC 104 interface module; the RAM control module completes butting joint of the FPGA module and the RAM module so as to realize the transmission of data between the FPGA and the ZBT-SRAM; and the high-speed DAC control module completes butting joint of the FPGA module and the high-speed DAC module and controls the high-speed DAC module to generate various radar waveforms.
Owner:BEIHANG UNIV

Customizable automatic tracking system based on video monitoring

InactiveCN101572803ATelevision system detailsImage analysisVideo monitoringExercise state
The invention discloses a system which can realize automatic tracking to a motion object which is appointed by users in video monitoring. In the system, a camera is fixed on a cloud platform, firstly the camera obtains an image and transmits an image data to a PC computer, and the PC computer realizes the analyzing and the processing of the image. The system automatically marks the positions of the motion objects on the image, and users can appoint the object which needs to be monitored therefrom. The system extracts the color characteristic of the monitoring object and judges the moving direction of the cloud platform according to the position of the monitoring object in the image; and the PC computer sends an order to control the mechanical cloud platform to drive the camera to track the monitoring object which is under a motion state, so as to lead the monitoring object to be capable of locating in the center of a monitoring picture from beginning to end and improve the intelligent of the video monitoring.
Owner:UNIV OF SCI & TECH OF CHINA

Electric transmission line monitoring communication system based on super-distance wireless optical network

InactiveCN103178902AIncrease transfer rateImprove real-time performanceRadio-over-fibrePower utilityFiber
The invention discloses an electric transmission line monitoring communication system based on a super-distance wireless optical network. The system comprises a wireless private network communication sub-network or a wireless private network and optical fiber mixed communication sub-network, a super-distance optical fiber communication backbone network, a monitoring primary station and a system network manager. The super-distance wireless optical network is characterized in that the wireless private network and optical fiber mixed communication sub-network wirelessly converges monitoring nodes of a plurality of nearby towers in a transmission line, an OPGW (optical fiber composite overhead ground wire) optical fiber communication system realizes uplink of the multiple nodes wirelessly converged, the optical fiber convergence nodes are connected to a transformer substation through an ADSS (all-dielectric self-supporting optic fiber cable), the wireless communication sub-network converges nodes of a plurality of nearby towers from node to multiple nodes, convergence signals are transmitted to the transformer substation by a wireless node-to-node manner, and data transmission between the transformer substation and a power company headquarter is performed through the existing data networks.
Owner:千江(上海)信息科技有限公司

Method for combining GIS system with split joint wall system and device thereof

The invention discloses a method used for combining a GIS system with a splicing wall system and a device thereof. The invention is characterized in that a GIS client terminal and a GIS server terminal are adopted; the operation instruction of the customer is received by the GIS client terminal; a geographical information data is acquired from a GIS data base and an instruction used for acquiring the geographical information data from the GIS data base is generated; the instruction is sent to the GIS server terminal; the GIS server terminal executes a corresponding operation according to the instruction; and the corresponding geographical information is displayed on a splicing wall. Therefore, the invention has the advantages that the instruction which is sent to the GIS client terminal by the GIS server terminal comprises operation information, thereby being small in the data transmission quantity; the data obtained from the GIS data base is displayed on the GIS server terminal, thereby ensuring the quality of the image, effectively utilizing the high resolving capability and high definition of the splicing wall, and effectively achieving the combination between the GIS system and the splicing wall system; besides, the customer only needs to operate at the GIS client terminal, thereby being convenient for operation.
Owner:GUANGDONG VTRON TECH CO LTD
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